I'm Ruisheng Zhao — a cross-platform mobile engineer focused on performance, product experience, and real-world impact. With over a decade of experience across Objective-C, Swift, Flutter, React Native, and Next.js, I’ve built apps used by millions and platforms where reliability is mission-critical.
At So-Young, I led iOS architecture across multiple product lines — cutting app size by 40MB and maintaining a crash rate below 0.02%. At AiNaDoctor, I’m building a full-stack healthcare SaaS platform with PostgreSQL, Prisma, and Python — connecting robust backend services to real-time mobile experiences.
My AI work spans edge-native inference and cloud orchestration. I’ve built lightweight pose estimation systems like MovePose with TensorFlow Lite, and deployed on-device LLMs using llama.cpp, Metal, SIMD, and NDK. I’ve also integrated multimodal retrieval pipelines using OpenCLIP, FAISS, and real-time voice AI agents with LiveKit Agents, WebRTC, and STT/TTS stacks.
I care about building software that doesn’t just work — it performs, scales, and feels great to use. Whether it's compressing a model, optimizing a pipeline, or designing cross-platform UI, my goal is to move fast, think clearly, and build with empathy.
Technologies: llama.cpp, GGML, WebRTC, Metal, NDK, SIMD, Core ML, Swift, Kotlin, C++, TensorFlow Lite, LiveKit, Dialogflow CX, PostgreSQL, Prisma, React Native, Flutter, REST APIs